Kernel parameter modification time and value

[Avinash20]

OS: 11.11
Is it possible to know the previous kernel parameters list
Is there a way to know the kernel parameter value set in /stand/vmunix.prev

Also are there any logs which says which kernel parameter were modified.

[Anka · Accepted solution]

/var/adm/kc.log

and see the system.prev file

[Anka]

Just made a mistake :) on 11.11 systems you will not find the kc.log file
Will try to find if there is an equivalense...
If someone knows please feel free to share :)

[Avinash20]

http://docs.hp.com/en/B3921-90010/kmtune.1M.html

-c text
Specify an optional comment string. All changes to the kernel parameters are logged with the date, old value, new value, user id and this comment. This option is used with -r and -s. The comment text will generally need to be quoted so that it is interpreted as a single parameter by the shell. The comment text may contain newlines. The log is written to the file /var/adm/kc.log. The format of the log file is subject to change in the future.

[Avinash20]

Anka.. You are right..
There is no /var/adm/kc.log in 11iv1

Gurus, please let me know how to check the
Logs of all tunable changes made using kmtune

[Steven E. Protter]

Shalom,

There is no kc.log in 11.11 because kctune is a feature added in 11.23.

kmtune probably provides logs of some type.

The date stamp on /stand/vmunix.prev is a pretty good indicator of WHEN the work was done.

There should be a backup of the system file in stand and you can do a simple diff command on that.

SEP

[Anka]

So i searched and discussed and the conclusion is that there is no equivalence of the /var/adm/kc.log for 11.11 systems

The /stand/system.prev can help in this situation

[Jeeshan]

You can check it through SAM log

Run '/usr/sam/bin/samlog_viewer' and see what parameters SAM ran.

Or you can 'view' /var/sam/log/samlog to search for yourself.

[Avinash20]

If /stand/system.prev exist, then we could compare the values with /stand/system

We can take help of /var/sam/log/samlog if kernel parameter modified with sam

cat /var/sam/log/samlog | grep /usr/sbin/kmtune